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Tails

tail sheath

The protoplasmic envelope in the tail of a spermatozoon.


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Re: Beneficial mutations vs harmful

... beneficial gene (given the correct environment) when the ''word'' is spelt. You will not be seeing desert-dwelling animals evolve flat, oar-like tails for aquatic locomotion because that would be a neutral or disadvantageous mutation, and it would not aid in the hypothetical species's survival, ...

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by Coelacanth
Sun Oct 13, 2013 6:08 am
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7845

Re: Do snakes have tails???

Some snakes have tails that enable them to hold onto branches or vines to assist them in climbing trees. And of course a rattlesnake uses its tail as a warning device when it is scared. Many harmless snakes also vibrate their tails, ...

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by elizabeth35
Tue Aug 27, 2013 10:28 am
 
Forum: Zoology Discussion
Topic: Do snakes have tails???
Replies: 25
Views: 35271

Atavism

We all have had tails - they develop in the embryo but are resorbed (not in all cases, the ones that have some appearance at birth), and they are definitely tails. Tails (post-anal) are a shared feature of all mammals, and the embryonic ...

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by Darby
Tue Aug 20, 2013 11:19 pm
 
Forum: Human Biology
Topic: Atavism
Replies: 4
Views: 2694

Atavism

... said the boy's grandfather showed journalists nine spots on the baby's body, which is what Lord Hanuman supposedly had. Cases of babies with “tails” surface occasionally. A paper in The New England Journal of Medicine in 1982 by Dr. Fred Ledley was titled “Evolution and the Human Tail.” But ...

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by Sumanth001
Tue Aug 20, 2013 6:40 am
 
Forum: Human Biology
Topic: Atavism
Replies: 4
Views: 2694

Re: Do snakes have tails???

... same as any other animal's, except that they have no limbs ears or eyelids, and they have many more ribs than other animals. They certainly have tails.

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by animartco
Wed Aug 07, 2013 1:14 pm
 
Forum: Zoology Discussion
Topic: Do snakes have tails???
Replies: 25
Views: 35271
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